Seesaw.



E. HARDY.

SEESAW.

APPLICATION FILED MAF.. 2, 1916.

1L ,QUKQ Patented Dec. 5,1916.

@l @W Mm y Y AnoH/l/Eys SEESAW.

Lacasse.

Application led March 2, 1916.

To all whom t may concern:

Be it known that I, EDWARD HARDY, a citizen of the United States, and a resident of Canton, in the county of Lewis and State of Missouri, have made certain new and useful improvements in Seesaws, of which the following is a specification.

My invention is an improvement in seesaws, and has for its object to provide a device of the character specified having means for supporting a plurality of seats, and wherein the seats are connected to the said supporting means in such manner that the seats may be elevated or depressed by the occupants, and wherein other mechanism is provided arranged between the seats and the swinging support for permitting the occupants to swing the support.

In the drawing: Figure 1 is a front view of the improved see-saw, Fig. 2 is a front view of one of the seats, and, Fig. 3 is a perspective view of one end of the swinging support.

The present embodiment of the invention comprises a suitable support in the form of a standard consisting of spaced parallel members 1, but one of which is shown, and

a frame is mounted to rock between the standards. This frame is composed of pipes of suitable size, and is substantially rectangular in form, comprising` spaced parallel side members 2, and connecting end members 3, the side and end members being connected by elbows 4, as shown.

The side members 2 are connected near each end by a cross bar or pipe 5, the said pipes or bars being parallel with the end members 3, but spaced apart therefrom. A. shaft 6 is journaled in the standards 1 between the same, and the side members 2 of the frame are provided with bearings 7 on the under sides of the said members, and the said bearings engage the shaft. The bearings are at the center of the side members so that the supporting frame is balanced on j the shaft.

Seats 8 are connected with the ends of the swinging support, and each seat is provided with mechanism for swinging the support. Each of the seats, as shown, comprises the seat proper, a foot rest 9 and a species of dash board or foot plate 10 in Specification of Letters Patent.

Patented Dec, 5, 1918,

serial no. 81,743.

body of the bail extending transversely of the seat, and a pulley 13 is connected to the body of each bail, each of the said pulleys being journaled in spaced parallel bearing lugs 14 connected with the body of the bail.

A flexible member 15 as for instance a rope or cable, is provided in connection with each seat for suspending the same. @ne end of each of the flexible members is provided with an eye 16, which engages the adjacent cross bar 5 and from the eye the iexible member passes downwardly beneath the pulley 13, before mentioned, and from the pulley 13 the flexible member passes aipwardly over a pulley 19, which is ournaled in the arms of a. fork at the lower end of a nlrgQO, supported by the adjacent cross Each of the links has its upper end pivoted between a pair of lugs 21, on a sleeve 22 mounted on the adjacent end bar 3 at the center thereof. The pulley 19 is thus suspended below theend bar 3. From the pulley 19 each flexible member passes downwardly and winds upon a shaft 23 which is journaled at one end in a bearing 17 on the body 11 of the bail. The other end of each shaft 23 is journaled in the upper end of a standard 18, which is connected with the adjacent foot board 9 and extends upwardly therefrom. Vlhe shaft 23 is provided with a worm wheel 19 at the end adjacent to the standard 18, and a worm 211 on a vertical shaft 25 meshes with the worm wheel.

The shaft 25 is journaled in a bearing 2.6 extending laterally from the standard 18, and in the horizontal portion of an angle plate 27 connected with the foot plate 10 and with the standard 18. This bracket 27 is an acute angle, the inclined portion being connected with the foot plate, while the horizontal portion extends inward tol a connection with the standard 18.

A. bevel gear wheel 28 is secured to the shaft 25 just above the horizontal portion of the angle plate 27, and this bevel gear meshes with a bevel pinion 29 on a stubshaft 30, journaled in the standard 18.

llfhe stub-shaft is journaled with a handwheel 31V at its inner end, and the handle of the wheel is Vin position to be engaged by the occupant of the seat to rotate the stub-shaft and to thus rotate shafts 25 and 23. By means of the hand-wheel the seats may be raised or` lowered to occupy the positions shown in Fig. l.

' seat, the free end of the flexible member having a ring 38 for the occupant of the seat to grasp.

In operation, the seats would normally keep the position shown at the right of Fig. l, thus resting upon the ground and with the swinging frame 2--3--4 in horizontalposition. When it is desired to use the see-saw, the occupants will seat them- M selves in the seat, and by means of the I. vhand wheel 31 thev will elevate the seats,v

as shown at the left in Fig. 1, and as the hand-wheel 31 is rotated in the proper direction the flexible member 15 will be wound up on the shaft 23. When the occupants wish to swing the see-saw they will make traction on the flexible members 32.

When the ring of the flexible member is drawn downwardly, the lower end of the link 20 will be drawn toward the crossbar, and a swinging movement will be imparted to the swinging frame and also to the seats. When traction is made on either flexible member, the weight of the occun pant and of the vseat will be moved nearer tothe point of suspension of the swinging frame, thus shortening the distance between thev weight and the point of suspension. The seat will be swung more nearly below the cross bar 5, and this shifting of the weight'will cause the see-saw to swing.

1.1In combination, a standard and a swinging frame mounted to swing on the standard, said frame being substantially rectangular, and having a transverse shaft intermediate its ends journaled on the standard, said frame having a cross bar near each end and spaced apart inwardly from the end, a seat for each end of the support, a bail connected with each seat and provided with a pulley at its center, a link pivoted to the end of each frame and depending therefrom and provided with a pulley, a flexible member connected at one end with the cross bar and passing beneath the pulley of the bail and over the pulley ofthe link, va shaft journaled transversely ofthe bail and supported by the bail at 'l onev end, a support for the other end of the tical shaft supported by the seat and having a worm gear connection with the rst named shaft, a stub-shaft provided with a handwheel journaled on the seat at the lower end of the vertical shaft, and having a geared connection therewith, and means for shifting the weight of each seat with respect to the swinging frame.

2. In combination, a standard and a swinging frame mounted to swing on the standard, said frame being substantially rectangular, and having a transverse shaft intermediate its ends journaled on the standard, said frame having a cross bar near each end and spaced apart inwardly from the end, a seat for each end of the frame, a bail connected with each seat and provided with a pulley at its center, a link pivoted to the end of each frame and depending therefrom and provided with a pulley, a flexible member connected at one end with the cross bar and passing beneath the pulley of the bail and over the pulley of the link, a shaft journaled transversely of the bail and supported by the bail at one end, a support for the other end of the shaft, the other end of the flexible member winding on the shaft, and means for rotating the shaft, said means comprising a vertical shaft supported by the seat and having a worm gear connection with the first named shaft, a stub-shaft provided with a hand-wheel journaled lon the seat at the lower end of the vertical shaft and having a geared connection therewith.

3. In combination, a standard and a swinging frame mounted to swing on the standard, said frame being substantially rectangular, and having a transverse shaft intermediate its ends journaled on the standard, said frame having a cross bar near each ond and spaced apart inwardly from the end, a seat for each end of the frame, a bail connected with each seat and provided with a pulley at its center, a link pivoted to the end of each frame and depending therefrom and provided with a pulley, a flexible member connected at one end with the cross bar and passing beneath the pulley of the bail and over the pulley of the link, a shaft journaled transversely of the bail and supported by the -bail at one end, a support for the other end of the shaft, the other end of the flexible member winding on the shaft, means for rotating the shaft, and meansoperable by the occupant of each seat for swinging the supporting frame, said means comprising a flexible member connected at one end of the cross bar, a pulley journaled at the lower end of the link over which the flexible member passes, and a pulley journaled on the cross bar, said flexible member passing over the pulley and depending toward the seat.v

Ll. In combination, a standard and a swinging frame mounted to swing on the end and spaced apart inwardly from the end, a seat for each end of the frame, a bail connected with each seat and provided with a pulley at its center, a link pivoted to the end of each frame and depending therefrom and provided with a pulley, a flexible mem ber connected at one end with the cross bar and passing beneath the pulley of the bail and over the pulley of the link, a shaft journaled transversely of the bail and supported by the bail at one end, a support for the other end of the shaft, the other end of the iieXible member winding on the shaft, means for rotating the shaft, and means operable by the occupant of each seat for swinging 'the supporting frame.

5. In combination, a standard and a swinging frame mounted to swing on the standard, said frame being substantially rectangular, and having a transverse shaft intermediate its ends journaled on the standard, said frame having` a cross bar near each end and spaced apart inwardly from the end, a seat for each end of the frame, a bail connected with each seat and provided with a pulley at its center, a link pivoted to the end of each frame and depending therefrom and provided with a pulley, a flexible member connected at one end with the cross bar and passing beneath the pulley of the bail and over the pulley of the link, a shaft journaled transversely of the bail and supported by the bail at one end, a support for the other end of the shaft, the other end of the flexible member winding on the shaft, and means for rotating the shaft.

6. In combination, a standard and a frame :mounted to swing on the standard intermediate the ends of the frame, a seat at each end of the frame, a rope and pulley connection between each end of the frame and the adjacent seat for raising and lowering the seat, a reel in connection with each seat to which the end of the rope is connected, and means operable by the occupant of each seat for swinging the supporting frame.

7. In combination, a standard and a frame mounted to swing on the standard intermediate the ends of the frame, a seat at each end of the frame, a rope and pulley connection between each end of the frame and the adjacent seat for raising and lowering the seat, a reel in connection with each seat to which the end of the rope is connected, and means for operating each reel supported by the seat.

EDWARD HARDY. Witnesses JA. II. B.'BLOND, F. R. LAwRnNonsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

